Electric switching device



Sept. 25, 1928i.

M. W. COOKE ET AL ELECTRIC SWITGHING DEVICE Filed May 2s, 1927 'Patentedsept. 25, 192s. i

MILTON W. COOKE, OE MOUNT LEBANON, AND oscAE wILLIAMs, OE PITTSBURGH, fPENNSYLVANIA.

ELECTRIC swITcHING DEVICE. i

A.Applica'nm ined may 23,

i ularly applicable to street railways in whichV is employed avspringpressed toggle joint and a solenoid and plungertype armature inconjunction therewith; andthe advantages of our improvements are; first,to provide an improved holding devicev for the switch tongue, second, toapply the electro-mechanical orce to the holding parts inthe mostefficient manner; and third; to reduce the number of parts and joints.

IVe attain these objects by the Velectro.- mechanical structureillustrated in the accompanying `drawing in which- Fig. 1 is a plan viewofthe entire. apparatus including a section of the track switch,

ground box without cover, toggle .joint and electro magnetwith itsplunger armature;

Fig. 2 is a side elevation of the apparatus.,

Fig. 3 is a cross-sectional view o f a part of Fig. 1 along the lineIML-A with a section of a switch throwing iron added;

Fig. 4 is a cross-sectional view of Fig. 1 along the line B-B withv thetoggle joint inmid-way position. Iievers 1 and 2 are pivoted in bearings'cast integrallywith ground-box 3 by pins l?, 2a. These leyers arearticulated at their inner ends by pin 4 which also carries one'end yofplunger link 5, the other end of which is articulated lwith plungerarmature 6a of magnet 6,.`

Lever 2 is constructed of two parts,-2b and 2C, the latter beingtelescoped into the former. Adjustable collar 21 is threaded on to mem-lber 2c so as to effect the desired pressure inv the toggle jointbyvmeans of spring 7 Link 8 is fixed to switch tongue 9 of track 10 andattached to Alever 1 by pin 1b so as to permit lost motion between thetoggle joint and the switch tongue.y i

In the lid 3,, is an-opening3l, through which switch throwing iron l1can be inserted `so as to engage slot' 1c Itovlever 1.

' This arrangement is provided for the .pur-

' 'pose of manually throwing switch the desired'position.

tongue to Magnet 6 isheld in a i'ixed position in the 1927. lSerial No.193,495.

ground boxV lor casin'g 3 by ineans'ot lugs 3b and is constructed wit-htwo solenoids 12Hm 13, one at each end to operate plunger 6a tov reversepositions as is usually foundin electric switch throwing art such as isfound in the patent to Cheatham No. 612,702, issuedl October 18, 1898.As the current is applied to section 12 ofthe magnet G,farmature,6 willbe pulled into the center cylinder of the magnet and thereby force thetoggle joint j operations the switch tongue 9 is carried from oneposition to the other as desired.

We are aware that prior to our invention electrically operated trackswitches with various spring holding devices have been made;

We, therefore, do not claim such a combil nation broadly; but we claim:

1. In an electrically `Y.operated 'switch throwing device comprising asolenoid and a magnetic plunger Vconnected to a toggle joint employinga-common articulation.

2. In anelectrically operated switch throwing device comprising asolenoid and a magnetic plunger'equipped with a linkage connected to atoggle joint providedwith a pair of levers, said plunger linkage and`levers having a common articulation.

3. In an electrically operated lswitch j ground box comprising asolenoid and a magnetic plunger connected to a toggle joint with acommon articulation.

4. In an electrically operated switch ground box comprising a connectedto a toggle joint provided` with -a pair of levers, said'plunger, linkand levers having a common articulation.y

5. In combination with a track switchiof an electrically operated switchthrowing de` vicecomprising a solenoid and a magnetic` plunger connectedto a toggle joint with a Vthrowing device mounted within an integral Y pv 1,685,149

common articulation, and linkage means for connecting the track switchto the toggle joint. y a 6. In an electrically operated switch 5throwing device mounted within an integral double compartment groundbox, comprising avsolenoid and a magnetic plunger disposed in onecompartment provided with a linkage `connected to a toggle jointdisposed in the other compartment7 provided with a pair o1u 10 levershaving a common articulation for Saidplunger linkagc and said levers.

' In testimony whereof We affix our signatures.

MILTON,W. COOKE. p OSCAR WILLIAMS

